[2] | 1 | <?php |
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| 2 | /*********************************************************************** |
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| 3 | ** Title.........: Image Transformation Interface |
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| 4 | ** Version.......: 1.0 |
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| 5 | ** Author........: Xiang Wei ZHUO <wei@zhuo.org> |
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| 6 | ** Filename......: Transform.php |
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| 7 | ** Last changed..: 30 Aug 2003 |
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| 8 | ** Notes.........: Orginal is from PEAR |
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| 9 | |
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| 10 | Added a few extra, |
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| 11 | - create unique filename in a particular directory, |
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| 12 | used for temp image files. |
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| 13 | - added cropping to GD, NetPBM, ImageMagick |
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| 14 | **/ |
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| 15 | |
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| 16 | // +----------------------------------------------------------------------+ |
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| 17 | // | PHP Version 4 | |
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| 18 | // +----------------------------------------------------------------------+ |
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| 19 | // | Copyright (c) 1997-2002 The PHP Group | |
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| 20 | // +----------------------------------------------------------------------+ |
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| 21 | // | This source file is subject to version 2.02 of the PHP license, | |
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| 22 | // | that is bundled with this package in the file LICENSE, and is | |
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| 23 | // | available at through the world-wide-web at | |
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| 24 | // | http://www.php.net/license/2_02.txt. | |
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| 25 | // | If you did not receive a copy of the PHP license and are unable to | |
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| 26 | // | obtain it through the world-wide-web, please send a note to | |
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| 27 | // | license@php.net so we can mail you a copy immediately. | |
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| 28 | // +----------------------------------------------------------------------+ |
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| 29 | // | Authors: Peter Bowyer <peter@mapledesign.co.uk> | |
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| 30 | // | Alan Knowles <alan@akbkhome.com> | |
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| 31 | // | Vincent Oostindie <vincent@sunlight.tmfweb.nl> | |
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| 32 | // +----------------------------------------------------------------------+ |
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| 33 | // |
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| 34 | // |
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| 35 | // Image Transformation interface |
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| 36 | // |
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| 37 | |
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| 38 | |
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| 39 | /** |
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| 40 | * The main "Image_Resize" class is a container and base class which |
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| 41 | * provides the static methods for creating Image objects as well as |
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| 42 | * some utility functions (maths) common to all parts of Image Resize. |
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| 43 | * |
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| 44 | * The object model of DB is as follows (indentation means inheritance): |
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| 45 | * |
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| 46 | * Image_Resize The base for each Image implementation. Provides default |
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| 47 | * | implementations (in OO lingo virtual methods) for |
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| 48 | * | the actual Image implementations as well as a bunch of |
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| 49 | * | maths methods. |
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| 50 | * | |
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| 51 | * +-Image_GD The Image implementation for the PHP GD extension . Inherits |
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| 52 | * Image_Resize |
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| 53 | * When calling DB::setup for GD images the object returned is an |
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| 54 | * instance of this class. |
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| 55 | * |
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| 56 | * @package Image Resize |
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| 57 | * @version 1.00 |
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| 58 | * @author Peter Bowyer <peter@mapledesign.co.uk> |
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| 59 | * @since PHP 4.0 |
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| 60 | */ |
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| 61 | Class Image_Transform |
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| 62 | { |
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| 63 | /** |
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| 64 | * Name of the image file |
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| 65 | * @var string |
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| 66 | */ |
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| 67 | var $image = ''; |
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| 68 | /** |
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| 69 | * Type of the image file (eg. jpg, gif png ...) |
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| 70 | * @var string |
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| 71 | */ |
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| 72 | var $type = ''; |
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| 73 | /** |
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| 74 | * Original image width in x direction |
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| 75 | * @var int |
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| 76 | */ |
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| 77 | var $img_x = ''; |
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| 78 | /** |
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| 79 | * Original image width in y direction |
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| 80 | * @var int |
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| 81 | */ |
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| 82 | var $img_y = ''; |
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| 83 | /** |
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| 84 | * New image width in x direction |
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| 85 | * @var int |
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| 86 | */ |
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| 87 | var $new_x = ''; |
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| 88 | /** |
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| 89 | * New image width in y direction |
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| 90 | * @var int |
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| 91 | */ |
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| 92 | var $new_y = ''; |
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| 93 | /** |
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| 94 | * Path the the library used |
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| 95 | * e.g. /usr/local/ImageMagick/bin/ or |
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| 96 | * /usr/local/netpbm/ |
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| 97 | */ |
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| 98 | var $lib_path = ''; |
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| 99 | /** |
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| 100 | * Flag to warn if image has been resized more than once before displaying |
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| 101 | * or saving. |
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| 102 | */ |
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| 103 | var $resized = false; |
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| 104 | |
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| 105 | |
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| 106 | var $uid = ''; |
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| 107 | |
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| 108 | var $lapse_time =900; //15 mins |
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| 109 | |
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| 110 | /** |
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| 111 | * Create a new Image_resize object |
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| 112 | * |
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| 113 | * @param string $driver name of driver class to initialize |
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| 114 | * |
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| 115 | * @return mixed a newly created Image_Transform object, or a PEAR |
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| 116 | * error object on error |
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| 117 | * |
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| 118 | * @see PEAR::isError() |
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| 119 | * @see Image_Transform::setOption() |
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| 120 | */ |
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| 121 | function &factory($driver) |
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| 122 | { |
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| 123 | if ('' == $driver) { |
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| 124 | die("No image library specified... aborting. You must call ::factory() with one parameter, the library to load."); |
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| 125 | |
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| 126 | } |
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| 127 | $this->uid = md5($_SERVER['REMOTE_ADDR']); |
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| 128 | |
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| 129 | include_once "$driver.php"; |
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| 130 | |
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| 131 | $classname = "Image_Transform_Driver_{$driver}"; |
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| 132 | $obj =& new $classname; |
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| 133 | return $obj; |
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| 134 | } |
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| 135 | |
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| 136 | |
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| 137 | /** |
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| 138 | * Resize the Image in the X and/or Y direction |
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| 139 | * If either is 0 it will be scaled proportionally |
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| 140 | * |
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| 141 | * @access public |
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| 142 | * |
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| 143 | * @param mixed $new_x (0, number, percentage 10% or 0.1) |
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| 144 | * @param mixed $new_y (0, number, percentage 10% or 0.1) |
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| 145 | * |
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| 146 | * @return mixed none or PEAR_error |
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| 147 | */ |
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| 148 | function resize($new_x = 0, $new_y = 0) |
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| 149 | { |
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| 150 | // 0 means keep original size |
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| 151 | $new_x = (0 == $new_x) ? $this->img_x : $this->_parse_size($new_x, $this->img_x); |
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| 152 | $new_y = (0 == $new_y) ? $this->img_y : $this->_parse_size($new_y, $this->img_y); |
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| 153 | // Now do the library specific resizing. |
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| 154 | return $this->_resize($new_x, $new_y); |
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| 155 | } // End resize |
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| 156 | |
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| 157 | |
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| 158 | /** |
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| 159 | * Scale the image to have the max x dimension specified. |
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| 160 | * |
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| 161 | * @param int $new_x Size to scale X-dimension to |
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| 162 | * @return none |
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| 163 | */ |
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| 164 | function scaleMaxX($new_x) |
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| 165 | { |
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| 166 | $new_y = round(($new_x / $this->img_x) * $this->img_y, 0); |
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| 167 | return $this->_resize($new_x, $new_y); |
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| 168 | } // End resizeX |
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| 169 | |
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| 170 | /** |
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| 171 | * Scale the image to have the max y dimension specified. |
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| 172 | * |
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| 173 | * @access public |
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| 174 | * @param int $new_y Size to scale Y-dimension to |
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| 175 | * @return none |
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| 176 | */ |
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| 177 | function scaleMaxY($new_y) |
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| 178 | { |
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| 179 | $new_x = round(($new_y / $this->img_y) * $this->img_x, 0); |
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| 180 | return $this->_resize($new_x, $new_y); |
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| 181 | } // End resizeY |
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| 182 | |
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| 183 | /** |
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| 184 | * Scale Image to a maximum or percentage |
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| 185 | * |
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| 186 | * @access public |
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| 187 | * @param mixed (number, percentage 10% or 0.1) |
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| 188 | * @return mixed none or PEAR_error |
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| 189 | */ |
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| 190 | function scale($size) |
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| 191 | { |
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| 192 | if ((strlen($size) > 1) && (substr($size,-1) == '%')) { |
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| 193 | return $this->scaleByPercentage(substr($size, 0, -1)); |
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| 194 | } elseif ($size < 1) { |
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| 195 | return $this->scaleByFactor($size); |
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| 196 | } else { |
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| 197 | return $this->scaleByLength($size); |
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| 198 | } |
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| 199 | } // End scale |
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| 200 | |
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| 201 | /** |
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| 202 | * Scales an image to a percentage of its original size. For example, if |
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| 203 | * my image was 640x480 and I called scaleByPercentage(10) then the image |
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| 204 | * would be resized to 64x48 |
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| 205 | * |
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| 206 | * @access public |
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| 207 | * @param int $size Percentage of original size to scale to |
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| 208 | * @return none |
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| 209 | */ |
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| 210 | function scaleByPercentage($size) |
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| 211 | { |
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| 212 | return $this->scaleByFactor($size / 100); |
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| 213 | } // End scaleByPercentage |
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| 214 | |
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| 215 | /** |
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| 216 | * Scales an image to a factor of its original size. For example, if |
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| 217 | * my image was 640x480 and I called scaleByFactor(0.5) then the image |
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| 218 | * would be resized to 320x240. |
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| 219 | * |
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| 220 | * @access public |
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| 221 | * @param float $size Factor of original size to scale to |
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| 222 | * @return none |
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| 223 | */ |
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| 224 | function scaleByFactor($size) |
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| 225 | { |
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| 226 | $new_x = round($size * $this->img_x, 0); |
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| 227 | $new_y = round($size * $this->img_y, 0); |
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| 228 | return $this->_resize($new_x, $new_y); |
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| 229 | } // End scaleByFactor |
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| 230 | |
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| 231 | /** |
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| 232 | * Scales an image so that the longest side has this dimension. |
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| 233 | * |
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| 234 | * @access public |
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| 235 | * @param int $size Max dimension in pixels |
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| 236 | * @return none |
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| 237 | */ |
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| 238 | function scaleByLength($size) |
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| 239 | { |
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| 240 | if ($this->img_x >= $this->img_y) { |
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| 241 | $new_x = $size; |
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| 242 | $new_y = round(($new_x / $this->img_x) * $this->img_y, 0); |
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| 243 | } else { |
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| 244 | $new_y = $size; |
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| 245 | $new_x = round(($new_y / $this->img_y) * $this->img_x, 0); |
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| 246 | } |
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| 247 | return $this->_resize($new_x, $new_y); |
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| 248 | } // End scaleByLength |
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| 249 | |
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| 250 | |
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| 251 | /** |
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| 252 | * |
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| 253 | * @access public |
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| 254 | * @return void |
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| 255 | */ |
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| 256 | function _get_image_details($image) |
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| 257 | { |
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| 258 | //echo $image; |
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| 259 | $data = @GetImageSize($image); |
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| 260 | #1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order), 8 = TIFF(motorola byte order, |
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| 261 | # 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC |
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| 262 | if (is_array($data)){ |
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| 263 | switch($data[2]){ |
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| 264 | case 1: |
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| 265 | $type = 'gif'; |
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| 266 | break; |
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| 267 | case 2: |
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| 268 | $type = 'jpeg'; |
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| 269 | break; |
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| 270 | case 3: |
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| 271 | $type = 'png'; |
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| 272 | break; |
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| 273 | case 4: |
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| 274 | $type = 'swf'; |
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| 275 | break; |
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| 276 | case 5: |
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| 277 | $type = 'psd'; |
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| 278 | case 6: |
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| 279 | $type = 'bmp'; |
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| 280 | case 7: |
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| 281 | case 8: |
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| 282 | $type = 'tiff'; |
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| 283 | default: |
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| 284 | echo("We do not recognize this image format"); |
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| 285 | } |
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| 286 | $this->img_x = $data[0]; |
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| 287 | $this->img_y = $data[1]; |
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| 288 | $this->type = $type; |
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| 289 | |
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| 290 | return true; |
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| 291 | } else { |
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| 292 | echo("Cannot fetch image or images details."); |
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| 293 | return null; |
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| 294 | } |
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| 295 | /* |
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| 296 | $output = array( |
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| 297 | 'width' => $data[0], |
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| 298 | 'height' => $data[1], |
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| 299 | 'type' => $type |
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| 300 | ); |
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| 301 | return $output; |
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| 302 | */ |
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| 303 | } |
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| 304 | |
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| 305 | |
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| 306 | /** |
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| 307 | * Parse input and convert |
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| 308 | * If either is 0 it will be scaled proportionally |
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| 309 | * |
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| 310 | * @access private |
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| 311 | * |
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| 312 | * @param mixed $new_size (0, number, percentage 10% or 0.1) |
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| 313 | * @param int $old_size |
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| 314 | * |
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| 315 | * @return mixed none or PEAR_error |
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| 316 | */ |
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| 317 | function _parse_size($new_size, $old_size) |
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| 318 | { |
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| 319 | if ('%' == $new_size) { |
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| 320 | $new_size = str_replace('%','',$new_size); |
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| 321 | $new_size = $new_size / 100; |
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| 322 | } |
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| 323 | if ($new_size > 1) { |
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| 324 | return (int) $new_size; |
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| 325 | } elseif ($new_size == 0) { |
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| 326 | return (int) $old_size; |
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| 327 | } else { |
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| 328 | return (int) round($new_size * $old_size, 0); |
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| 329 | } |
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| 330 | } |
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| 331 | |
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| 332 | |
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| 333 | function uniqueStr() |
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| 334 | { |
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| 335 | return substr(md5(microtime()),0,6); |
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| 336 | } |
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| 337 | |
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| 338 | //delete old tmp files, and allow only 1 file per remote host. |
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| 339 | function cleanUp($id, $dir) |
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| 340 | { |
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| 341 | $d = dir($dir); |
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| 342 | $id_length = strlen($id); |
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| 343 | |
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| 344 | while (false !== ($entry = $d->read())) { |
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| 345 | if (is_file($dir.'/'.$entry) && substr($entry,0,1) == '.' && !ereg($entry, $this->image)) |
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| 346 | { |
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| 347 | //echo filemtime($this->directory.'/'.$entry)."<br>"; |
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| 348 | //echo time(); |
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| 349 | |
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| 350 | if (filemtime($dir.'/'.$entry) + $this->lapse_time < time()) |
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| 351 | unlink($dir.'/'.$entry); |
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| 352 | |
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| 353 | if (substr($entry, 1, $id_length) == $id) |
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| 354 | { |
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| 355 | if (is_file($dir.'/'.$entry)) |
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| 356 | unlink($dir.'/'.$entry); |
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| 357 | } |
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| 358 | } |
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| 359 | } |
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| 360 | $d->close(); |
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| 361 | } |
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| 362 | |
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| 363 | |
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| 364 | function createUnique($dir) |
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| 365 | { |
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| 366 | $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type; |
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| 367 | |
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| 368 | //make sure the the unique temp file does not exists |
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| 369 | while (file_exists($dir.$unique_str)) |
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| 370 | { |
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| 371 | $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type; |
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| 372 | } |
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| 373 | |
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| 374 | $this->cleanUp($this->uid, $dir); |
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| 375 | |
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| 376 | return $unique_str; |
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| 377 | } |
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| 378 | |
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| 379 | |
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| 380 | /** |
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| 381 | * Set the image width |
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| 382 | * @param int $size dimension to set |
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| 383 | * @since 29/05/02 13:36:31 |
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| 384 | * @return |
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| 385 | */ |
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| 386 | function _set_img_x($size) |
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| 387 | { |
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| 388 | $this->img_x = $size; |
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| 389 | } |
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| 390 | |
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| 391 | /** |
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| 392 | * Set the image height |
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| 393 | * @param int $size dimension to set |
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| 394 | * @since 29/05/02 13:36:31 |
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| 395 | * @return |
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| 396 | */ |
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| 397 | function _set_img_y($size) |
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| 398 | { |
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| 399 | $this->img_y = $size; |
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| 400 | } |
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| 401 | |
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| 402 | /** |
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| 403 | * Set the image width |
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| 404 | * @param int $size dimension to set |
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| 405 | * @since 29/05/02 13:36:31 |
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| 406 | * @return |
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| 407 | */ |
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| 408 | function _set_new_x($size) |
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| 409 | { |
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| 410 | $this->new_x = $size; |
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| 411 | } |
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| 412 | |
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| 413 | /** |
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| 414 | * Set the image height |
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| 415 | * @param int $size dimension to set |
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| 416 | * @since 29/05/02 13:36:31 |
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| 417 | * @return |
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| 418 | */ |
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| 419 | function _set_new_y($size) |
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| 420 | { |
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| 421 | $this->new_y = $size; |
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| 422 | } |
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| 423 | |
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| 424 | /** |
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| 425 | * Get the type of the image being manipulated |
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| 426 | * |
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| 427 | * @return string $this->type the image type |
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| 428 | */ |
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| 429 | function getImageType() |
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| 430 | { |
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| 431 | return $this->type; |
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| 432 | } |
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| 433 | |
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| 434 | /** |
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| 435 | * |
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| 436 | * @access public |
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| 437 | * @return string web-safe image type |
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| 438 | */ |
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| 439 | function getWebSafeFormat() |
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| 440 | { |
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| 441 | switch($this->type){ |
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| 442 | case 'gif': |
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| 443 | case 'png': |
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| 444 | return 'png'; |
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| 445 | break; |
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| 446 | default: |
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| 447 | return 'jpeg'; |
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| 448 | } // switch |
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| 449 | } |
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| 450 | |
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| 451 | /** |
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| 452 | * Place holder for the real resize method |
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| 453 | * used by extended methods to do the resizing |
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| 454 | * |
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| 455 | * @access private |
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| 456 | * @return PEAR_error |
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| 457 | */ |
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| 458 | function _resize() { |
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| 459 | return null; //PEAR::raiseError("No Resize method exists", true); |
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| 460 | } |
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| 461 | |
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| 462 | /** |
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| 463 | * Place holder for the real load method |
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| 464 | * used by extended methods to do the resizing |
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| 465 | * |
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| 466 | * @access public |
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| 467 | * @return PEAR_error |
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| 468 | */ |
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| 469 | function load($filename) { |
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| 470 | return null; //PEAR::raiseError("No Load method exists", true); |
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| 471 | } |
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| 472 | |
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| 473 | /** |
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| 474 | * Place holder for the real display method |
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| 475 | * used by extended methods to do the resizing |
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| 476 | * |
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| 477 | * @access public |
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| 478 | * @param string filename |
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| 479 | * @return PEAR_error |
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| 480 | */ |
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| 481 | function display($type, $quality) { |
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| 482 | return null; //PEAR::raiseError("No Display method exists", true); |
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| 483 | } |
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| 484 | |
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| 485 | /** |
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| 486 | * Place holder for the real save method |
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| 487 | * used by extended methods to do the resizing |
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| 488 | * |
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| 489 | * @access public |
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| 490 | * @param string filename |
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| 491 | * @return PEAR_error |
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| 492 | */ |
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| 493 | function save($filename, $type, $quality) { |
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| 494 | return null; //PEAR::raiseError("No Save method exists", true); |
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| 495 | } |
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| 496 | |
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| 497 | /** |
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| 498 | * Place holder for the real free method |
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| 499 | * used by extended methods to do the resizing |
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| 500 | * |
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| 501 | * @access public |
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| 502 | * @return PEAR_error |
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| 503 | */ |
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| 504 | function free() { |
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| 505 | return null; //PEAR::raiseError("No Free method exists", true); |
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| 506 | } |
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| 507 | |
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| 508 | /** |
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| 509 | * Reverse of rgb2colorname. |
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| 510 | * |
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| 511 | * @access public |
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| 512 | * @return PEAR_error |
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| 513 | * |
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| 514 | * @see rgb2colorname |
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| 515 | */ |
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| 516 | function colorhex2colorarray($colorhex) { |
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| 517 | $r = hexdec(substr($colorhex, 1, 2)); |
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| 518 | $g = hexdec(substr($colorhex, 3, 2)); |
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| 519 | $b = hexdec(substr($colorhex, 4, 2)); |
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| 520 | return array($r,$g,$b); |
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| 521 | } |
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| 522 | |
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| 523 | /** |
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| 524 | * Reverse of rgb2colorname. |
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| 525 | * |
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| 526 | * @access public |
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| 527 | * @return PEAR_error |
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| 528 | * |
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| 529 | * @see rgb2colorname |
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| 530 | */ |
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| 531 | function colorarray2colorhex($color) { |
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| 532 | $color = '#'.dechex($color[0]).dechex($color[1]).dechex($color[2]); |
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| 533 | return strlen($color)>6?false:$color; |
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| 534 | } |
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| 535 | |
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| 536 | |
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| 537 | /* Methods to add to the driver classes in the future */ |
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| 538 | function addText() |
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| 539 | { |
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| 540 | return null; //PEAR::raiseError("No addText method exists", true); |
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| 541 | } |
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| 542 | |
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| 543 | function addDropShadow() |
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| 544 | { |
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| 545 | return null; //PEAR::raiseError("No AddDropShadow method exists", true); |
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| 546 | } |
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| 547 | |
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| 548 | function addBorder() |
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| 549 | { |
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| 550 | return null; //PEAR::raiseError("No addBorder method exists", true); |
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| 551 | } |
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| 552 | |
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| 553 | function crop() |
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| 554 | { |
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| 555 | return null; //PEAR::raiseError("No crop method exists", true); |
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| 556 | } |
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| 557 | |
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| 558 | function flip() |
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| 559 | { |
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| 560 | return null; |
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| 561 | } |
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| 562 | |
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| 563 | function gamma() |
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| 564 | { |
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| 565 | return null; //PEAR::raiseError("No gamma method exists", true); |
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| 566 | } |
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| 567 | } |
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| 568 | ?> |
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